A Japanese soldier was killed on Tuesday after a volcano erupted near a popular Japanese ski resort, sparking an avalanche that left several injured and scores stranded up a mountain, officials said.
Footage broadcast on Japanese television showed thick black smoke interspersed with falling rocks sliding down the snow-covered side of the volcano towards a ski slope.
Defence Minister Itsunori Onodera told reporters that one of eight members of the Self Defence Forces who had been on a training mission on Mt. Kusatsu Shirane, northwest of Tokyo, had died after being hit by volcanic rocks.
"His lungs were damaged" because of the impact of the rocks, Onodera said, adding that the other seven soldiers had sustained injuries.
The ministry had earlier said that six infantry personnel who had been on a training mission on the mountain were hit by the avalanche but had been rescued.
The falling rocks kicked clouds of snow into the air as they made impact.
"Black smoke rose from the top of the mountain and we were told to evacuate inside 30 minutes later," a man who was at the ski resort told public broadcaster NHK.
"About 100 people have evacuated," he said.
Japan's Meteorological Agency urged nearby residents to stay away from Mt. Kusatsu Shirane, northwest of Tokyo, after it detected what it said was "slight volcanic activity."
"Today an eruption occurred" at the mountain, agency official Makoto Saito told reporters.
He warned the volcano could still spew more rocks and ash and there was a risk of further avalanches.
A local fire department official told AFP 10 people had been injured in the incident.
"Five of them were seriously injured. We began sending the injured to a hospital," he said.
Stranded in gondola
Among the injured were four people hurt by shattered glass while on a ropeway gondola at the ski resort in Gunma.
Around 80 people were stranded for hours at a gondola station at the top of the mountain after a power outage.
Television footage showed military helicopters buzzing overhead as people were airlifted to safety.
Yuko Iguchi, an official from nearby Kusatsu town, told AFP: "All the people stranded at the summit were brought down to the safe zone. We have not received any injured people among them."
Another local official, Yoichi Takai, told AFP that "15 people from Taiwan and four from Britain were among those who were stranded at the peak."
One woman who was trapped at the gondola station but later rescued told Japanese TV: "There was an eruption in front of my eyes. Black and white plumes came towards me. Then the ski slope went completely black."
The area had seen heavy snowfall in the hours leading up to the eruption, making the slopes ripe for avalanches.
A snowboarder told NHK his gondola had stopped suddenly and he saw that other gondolas around him had broken windows and were covered in ash.
"I realised it was an eruption. Forty to 50 minutes later, all the gondolas moved up to the station on the top of the mountain," he said.
Ring of fire
Japan, with scores of active volcanoes, sits on the so-called Pacific "Ring of Fire" where a large proportion of the world's quakes and volcanic eruptions are recorded.
On September 27, 2014, Japan suffered its deadliest eruption in almost 90 years when Mount Ontake, in central Nagano prefecture, burst unexpectedly to life.
An estimated 63 people were killed in the shock eruption which occurred as the peak was packed with hikers out to see the region's spectacular autumn colours.
